Anrtisu Cell Master MT8212B, Руководство пользователя, Страница: 257 / 294

Active Data Power - The average power of the data channel portion of the active EVDO
slot that is captured. If no active slots are captured, then the unit will display N/A.
Power vs. Time Graph - In the lower part of the RF screen, a power versus time graph is
shown for an EVDO slot. The horizontal axis is time. The vertical axis is power in dB rela-
tive to the Pilot & MAC power reading (Pilot & MAC power is equated to 0 dB).
In an active slot, the averaged power fluctuation should be within ± 2.5 dB.
In an idle slot, the Pilot & MAC power should be at least 7dB above the data power.
The Cell Master provides an adjustable mask test function in Power vs. Time graphs. The
mask will be green if the sampled signal is within the mask envelope, and red if it is outside
the mask.
Idle or Active Activity % - This shows the estimated percentage of idle or active slots in the
total number of slots captured. This is calculated using a moving average window. Expect
the idle % to be low and the active % to be high when there are lots of EVDO users con-
nected to a base station.
EVDO RF Measurements
To make EVDO RF measurements, connect the Cell Master to the base station.
Step 1. On the Cell Master, press the MODE key, use the Up/Down arrow key to select
the
EVDO
mode and press ENTER .
Step 2. Select the
Signal Standard
soft key and press the
Select Standard
soft key. Use
the soft keys or the Up/Down arrow key to highlight the appropriate standard,
such as CDMA US PCS, and press ENTER .
Step 3. Press the
Select Channel
soft key and use the Up/Down arrow key or the nu-
meric keypad to enter the appropriate channel, such as 50, and press ENTER .
Step 4. Press the MEAS/DISP key and select the
RF Meas
soft key to display the RF
Measurements screen.
Chapter 18 EVDO Mode
18-7